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Ocean Power Technologies, Inc. Message Board

  • georgepiggytaylor georgepiggytaylor Aug 3, 2011 6:27 AM Flag

    My PowerPooey will last for 30 there

    Our PowerBuoy systems do not have a sufficient operating history to confirm how they will perform over their estimated 30-year useful life.

    We began developing and testing wave energy technology 13 years ago. However, to date we have only manufactured 12 PowerBuoy systems for use in ocean testing and development. The longest continuous in-ocean deployment of our PowerBuoy system has been for 12 months. As a result, our PowerBuoy systems do not have a sufficient operating history to confirm how they will perform over their estimated 30-year useful life. Our technology has not yet demonstrated that our engineering and test results can be duplicated in volume commercial production. We have conducted and plan to continue to conduct practical testing of our PowerBuoy system. If our PowerBuoy system ultimately proves ineffective or unfeasible, we may not be able to engage in commercialproduction of our products or we may become liable to our customers for quantities we are obligated but are unable to produce. If our PowerBuoy systems perform below expectations, we could lose customers and face substantial repair and replacement expense which could in turn adversely affect our business, financial condition and results of operations.

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    • What a load of Bucking Follocks!

    • "The simple link to OPT that I provided" contained no evidence whatsoever of performance, longevity or economic viabilty.

      Please try harder.

    • What I believe, is that Taylor has extensive electronic and electric engineering education, experience, and training, and has been enraptured or captivated by this distinct field all of his life. Capturing and harnessing Ocean wave energy is his lifelong dream, and has been his focus forever. Additionally, He has collaborated and surrounded himself with other likeminded individuals, in this arena. The 'smart part' is the brain of the system, and the only part that OPT actually produces. Everything else is farmed out. As such, their (Taylor's especially) expertise is in this one solitary part, and the associated corporate subcontracting, licensing, and marketing enterprise efforts, of course. The underwater POD addition, as a specialized underwater component, came later, also as a brainstorm of Taylor, in realizing that being a percipient frontrunner in Wave Farm or array accessory's, and testing, is highly desirable, and promotes package sales.
      Im not pasting 'technojargon', I am describing physical design factors (and the basic theory of op behind the design) incorporated into the hydraulic control and energy storage system of the buoy. I do not disagree, that this is complicated and the inner workings are on a highly technical level, requiring some degree of scientific and math ability, but you either attempt to understand it, or go buy Sara Lee. A lot of the basic scientific principles and terms of physics, hydraulics, thermodynamics, fluid flow, and electrical theory apply here, just as they equally apply to any technology. Having a solid foundation is important, and is not 'technojargon'.
      The simple link to OPT that I provided, was not propoganda, but the corporate product spec sheet, which has already been independently certified (structurally) by Lloyd’s Register as complying with international standards, for its intended purpose, including meeting the aforementioned IEEE grid interconnection standards (which do not need inverters/convertors).


    • Sailor Boy
      Any idiot can cut and paste technojargon.

      You actually believe that the PowerPhooey can anticipate the next wave and "tune" itself in readiness?

      You can convince yourself as much as you want to Sailor Boy.
      In order to convince a more rational audience you will need to produce EVIDENCE.
      (for the 1000th time, OPTT propaganda is NOT evidence.

    • Yes Keefy. That is what the 'smart' part is designed to do. Instead of getting mad, I challenge you to THINK, and maybe actually learn something.
      "The PowerBuoy provides grid quality electricity and is independently certified to meet all required grid interconnection standards."

      Think of the smart part as a 'Wave anticipator', which acts to regulate the buoys ability to sense actual incoming wave environments, and adjust as needed to increase maximum power absorption.
      We have went over this before. A waves power is directly proportional to the square of its height. That means a sig wave height environment of 2M has 4x the energy of a 1m high environment.
      Pelamis even knows that, lol
      So the 'smart' part, by design, regulates power output within grid frequency and voltage tolerances to the incoming wave power absorption characteristics, automatically and over time. This is the Taylor genius at work, and what sets OPT point source design front and center. If you know anything about hydraulics, then you know what an accumulator is, and how the design and capacity of the accumulator, valves and piping, provides an energy storage medium and pressure/volume fluid capacity factor to sustain prime mover movement and stability, over both changing load, and changing input energy absorption conditions. The usable volume of a hydraulic accumulator depends on its nominal volumetric size, the precharge pressure and the upper and lower design pressures of the accumulator. Accumulator volume design is also affected by what is the expected rate(s)of pressure change, called the adiabatic index,(or even isentropic expansion factor) and is ignored (or is a factor of 1) if pressure change rate is slow. High massflow rates of the hydraulic fluid also introduces turbulent flow characteristics (not to mention higher heat and temp rise issues)vs desired laminar flow, but this is kinda getting beyond the scope of this post, and my point remains, that inverters are NOT part of the OPT design.
      I studied all this extensively as part of the Navy Nuclear power curriculum training, in Heat transfer & Fluid flow, Thermodynamic fluid mechanics, and Hydralic principles, and although designers use analytical/differential calculus to examine the infinitesimal tangential's, as an operating engineer, we can *thankfully, lol) just extrapolate or estimate them.
      "The nuclear program is widely acknowledged as having the most demanding academic program in the U.S. military. The school operates at a fast pace, with stringent academic standards in all subjects. Students typically spend 45 hours pe......"


    • Oh really?
      So the PowerPhooey can produce a constant frequency, in phase with the grid?
      And it can do that reliably and uninterrupted in a wide range of wave conditions?
      Even during the lull between wave sets?
      That is Fur King amazing.

      I well, I suppose if Georgie says it's so........

      (you really are a d i c k head Sailor Boy!!)

    • Come on.

      Keefy, why are you mentioning inverters and converters as related to IEEE 1547 or UL1741? OPT makes AC voltage distributed gen equipment, that does not need inverters or convertors. This is considered a DG or a DR under IEEE1547 interconnection definitions.
      You are thinking (or really you are not, lol) along the lines of a solar system (which produces DC voltage), that would then need invertors/convertors to be able to be tied into the 'grid'. OPT DG is AC voltage by design, and does not need any inverter/convertor equipment.
      No-one cares about Islanding or anti-islanding, this is not a solar company DG.


    • Keefy...what aspect of the design, specifically, do you doubt the projected or expected longevity of? (this should be interesting, lol)

      1) Steel structure mechanical (weld failure, watertight integrity, etc)
      2) Steel structure corrosion preventing including coatings or claddings
      3) Hydraulics or fluid components (accumulator, pistons, seals, filters, valving, associated piping and mechanical equipment)
      4) Electrical generator, wiring, or distribution portion (POD), or cabling
      5) Communication (SCADA) or control (smart part) hardware or software
      6)Mooring or anchoring system
      7) Elephant testicles with or without formaldehyde or azomethine neutral dipolar molecule (ylide) bonding

      Give me a specific design, construction, mechanical, electrical, or physical concern you see as a flaw, that would impair the buoy from normal expected operation within its geographically specific (deployed) capacity factor, over its intended lifespan.

      I'm waiting.


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